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;;; -*- Log: code.log; Package: Lisp -*-
;;; ### Some day fix to accept :wild in any pathname component.
;;; **********************************************************************
;;; This code was written as part of the Spice Lisp project at
;;; Carnegie-Mellon University, and has been placed in the public domain.
;;; If you want to use this code or any part of Spice Lisp, please contact
;;; Scott Fahlman (FAHLMAN@CMUC).
;;; **********************************************************************
;;;
;;; Ugly pathname functions for Spice Lisp.
;;; these functions are part of the standard Spice Lisp environment.
;;;
;;; Written by Jim Large and Rob MacLachlan
;;;
;;; **********************************************************************
(in-package "LISP")
(export '(pathname pathnamep *default-pathname-defaults* truename
parse-namestring merge-pathnames make-pathname
pathname-host pathname-device pathname-directory
pathname-name pathname-type pathname-version
namestring file-namestring directory-namestring
host-namestring enough-namestring user-homedir-pathname
probe-file rename-file delete-file file-write-date
file-author directory))
(use-package "EXTENSIONS")
(in-package "EXTENSIONS")
(export '(print-directory complete-file ambiguous-files default-directory
file-writable))
(in-package "LISP")
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;;; Pathname structure
;;; *Default-Pathname-defaults* has all values unspecified except for the
;;; host. All pathnames must have a host.
(defvar *default-pathname-defaults* ()
"Set to the default pathname-defaults pathname (Got that?)")
(defun filesys-init ()
(setq *default-pathname-defaults*
(%make-pathname "Mach" nil nil nil nil nil)))
;;; The pathname type is defined with a defstruct.
;;; This declaration implicitly defines the common lisp function Pathnamep
(defstruct (pathname
(:conc-name %pathname-)
(:print-function %print-pathname)
(:constructor
%make-pathname (host device directory name type version))
(:predicate pathnamep))
"Pathname is the structure of the file pathname. It consists of a
host, a device, a directory, a name, and a type."
(host nil :type (or simple-string null))
(device nil :type (or simple-string (member nil :absolute)))
(directory nil :type (or simple-vector null))
(name nil :type (or simple-string null))
(type nil :type (or simple-string null))
(version nil :type (or integer (member nil :newest))))
(defun %print-pathname (s stream d)
(declare (ignore d))
(format stream "#.(pathname ~S)" (namestring s)))
(defun make-pathname (&key defaults (host nil hostp) (device nil devicep)
(directory nil directoryp) (name nil namep)
(type nil typep) (version nil versionp))
"Create a pathname from :host, :device, :directory, :name, :type and :version.
If any field is ommitted, it is obtained from :defaults as though by
merge-pathnames."
(if defaults
(let ((defaults (pathname defaults)))
(unless hostp
(setq host (%pathname-host defaults)))
(unless devicep
(setq device (%pathname-device defaults)))
(unless directoryp
(setq directory (%pathname-directory defaults)))
(unless namep
(setq name (%pathname-name defaults)))
(unless typep
(setq type (%pathname-type defaults)))
(unless versionp
(setq version (%pathname-version defaults))))
(unless hostp
(setq host (%pathname-host *default-pathname-defaults*))))
(when (stringp directory)
(setq directory (%pathname-directory (parse-namestring directory))))
(%make-pathname
(if (stringp host) (coerce host 'simple-string) host)
(if (stringp device) (coerce device 'simple-string) device)
directory
(if (stringp name) (coerce name 'simple-string) name)
(if (stringp type) (coerce type 'simple-string) type)
version))
;;; These can not be done by the accessors because the pathname arg may be
;;; a string or a symbol or etc.
(defun pathname-host (pathname)
"Returns the host slot of pathname. Pathname may be a string, symbol,
or stream."
(%pathname-host (if (pathnamep pathname) pathname (pathname pathname))))
(defun pathname-device (pathname)
"Returns the device slot of pathname. Pathname may be a string, symbol,
or stream."
(%pathname-device (if (pathnamep pathname) pathname (pathname pathname))))
(defun pathname-directory (pathname)
"Returns the directory slot of pathname. Pathname may be a string,
symbol, or stream."
(%pathname-directory (if (pathnamep pathname) pathname (pathname pathname))))
(defun pathname-name (pathname)
"Returns the name slot of pathname. Pathname may be a string,
symbol, or stream."
(%pathname-name (if (pathnamep pathname) pathname (pathname pathname))))
(defun pathname-type (pathname)
"Returns the type slot of pathname. Pathname may be a string,
symbol, or stream."
(%pathname-type (if (pathnamep pathname) pathname (pathname pathname))))
(defun pathname-version (pathname)
"Returns the version slot of pathname. Pathname may be a string,
symbol, or stream."
(%pathname-version (if (pathnamep pathname) pathname (pathname pathname))))
;;;; PARSE-NAMESTRING and PATHNAME.
;;; SPLIT-FILENAME -- internal
;;; Splits the filename into the name and type. If someone wants to change
;;; this yet again, just change this.
;;;
(defun split-filename (filename)
(declare (simple-string filename))
(let ((posn (position #\. filename :from-end t)))
(cond ((null posn)
(values filename nil))
((or (zerop posn) (= posn (1- (length filename))))
(values filename ""))
(t
(values (subseq filename 0 posn)
(subseq filename (1+ posn)))))))
;;; DO-FILENAME-PARSE -- internal
;;; Split string into a logical name, a vector of directories, a file name and
;;; a file type.
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(defun do-filename-parse (string &optional (start 0) end)
(declare (simple-string string))
(let ((end (or end (length string))))
(let* ((directories nil)
(filename nil)
(absolutep (and (> end start) (eql (schar string start) #\/)))
(logical-name
(cond (absolutep
(setf start (position #\/ string :start start :end end
:test-not #'char=))
:absolute)
((find #\: string
:start start
:end (or (position #\/ string :start start :end end)
end))
(let ((posn (position #\: string :start start)))
(prog1
(subseq string start posn)
(setf start (1+ posn))))))))
(loop
(unless (and start (> end start))
(return))
(let ((next-slash (position #\/ string :start start :end end)))
(cond (next-slash
(push (subseq string start next-slash) directories)
(setf start
(position #\/ string :start next-slash :end end
:test-not #'char=)))
(t
(setf filename (subseq string start end))
(return)))))
(multiple-value-bind (name type)
(if filename (split-filename filename))
(values (cond (logical-name logical-name)
(directories "Default"))
(if (or logical-name directories)
(coerce (nreverse directories) 'vector))
name
type)))))
(defun parse-namestring (thing &optional host
(defaults *default-pathname-defaults*)
&key (start 0) end junk-allowed)
"Convert THING (string, symbol, pathname, or stream) into a pathname."
(declare (ignore junk-allowed))
(let* ((host (or host (pathname-host defaults)))
(pathname
(etypecase thing
((or string symbol)
(let ((string (coerce (string thing) 'simple-string)))
(multiple-value-bind (device directories name type)
(do-filename-parse string start end)
(unless end (setf end (length string)))
(make-pathname :host host
:device device
:directory directories
:name name
:type type))))
(pathname
(setf end start)
thing)
(stream
(setf end start)
(pathname (file-name thing))))))
(unless (or (null host)
(null (pathname-host pathname))
(string-equal host (pathname-host pathname)))
(cerror "Ignore it."
"Host mismatch in ~S: ~S isn't ~S"
'parse-namestring
(pathname-host pathname)
host))
(values pathname end)))
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(defun pathname (thing)
"Turns thing into a pathname. Thing may be a string, symbol, stream, or
pathname."
(values (parse-namestring thing)))
;;; Merge-Pathnames -- Public
;;;
;;; Returns a new pathname whose fields are the same as the fields in PATHNAME
;;; except that () fields are filled in from defaults. Type and Version field
;;; are only done if name field has to be done (see manual for explanation).
;;;
(defun merge-pathnames (pathname &optional
(defaults *default-pathname-defaults*)
default-version)
"Fills in unspecified slots of Pathname from Defaults (defaults to
*default-pathname-defaults*). If the version remains unspecified,
gets it from Default-Version."
;;
;; finish hairy argument defaulting
(setq pathname (pathname pathname))
(setq defaults (pathname defaults))
;;
;; make a new pathname
(let ((name (%pathname-name pathname))
(device (%pathname-device pathname)))
(%make-pathname
(or (%pathname-host pathname) (%pathname-host defaults))
(or device (%pathname-device defaults))
(or (%pathname-directory pathname) (%pathname-directory defaults))
(or name (%pathname-name defaults))
(or (%pathname-type pathname) (%pathname-type defaults))
(or (%pathname-version pathname)
(if name
default-version
(or (%pathname-version defaults) default-version))))))
;;;; NAMESTRING and other stringification stuff.
;;; %Dirstring -- Internal
;;;
;;; %Dirstring converts a vector of the form #("foo" "bar" ... "baz") into a
;;; string of the form "foo/bar/ ... /baz/"
(defun %dirstring (dirlist)
(declare (simple-vector dirlist))
(let* ((numdirs (length dirlist))
(length numdirs))
(declare (fixnum numdirs length))
(dotimes (i numdirs)
(incf length (the fixnum (length (svref dirlist i)))))
(do ((result (make-string length))
(index 0 (1+ index))
(position 0))
((= index numdirs) result)
(declare (simple-string result))
(let* ((string (svref dirlist index))
(len (length string))
(end (+ position len)))
(declare (simple-string string)
(fixnum len end))
(replace result string :start1 position :end1 end :end2 len)
(setf (schar result end) #\/)
(setq position (+ end 1))))))
(defun quick-integer-to-string (n)
(cond ((zerop n) "0")
((eql n 1) "1")
((minusp n)
(concatenate 'simple-string "-"
(the simple-string (quick-integer-to-string (- n)))))
(t
(do* ((len (1+ (truncate (integer-length n) 3)))
(res (make-string len))
(i (1- len) (1- i))
(q n)
(r 0))
((zerop q)
(incf i)
(replace res res :start2 i :end2 len)
(%primitive shrink-vector res (- len i)))
(declare (simple-string res)
(fixnum len i r))
(multiple-value-setq (q r) (truncate q 10))
(setf (schar res i) (schar "0123456789" r))))))
(defun %device-string (device)
(cond ((eq device :absolute) "/")
(device
(if (string-equal device "Default")
""
(concatenate 'simple-string (the simple-string device) ":")))
(T "")))
(defun namestring (pathname)
"Returns the full form of PATHNAME as a string."
(setq pathname (pathname pathname))
(let* ((directory (%pathname-directory pathname))
(name (%pathname-name pathname))
(type (%pathname-type pathname))
(result (%device-string (%pathname-device pathname))))
(declare (simple-string result))
(when directory
(setq result (concatenate 'simple-string result
(the simple-string (%dirstring directory)))))
(when name
(setq result (concatenate 'simple-string result
(the simple-string name))))
(when (and type (not (zerop (length type))))
(setq result (concatenate 'simple-string result "."
(the simple-string type))))
result))
(defun %ses-get-useful-name (pathname)
"NAMESTRING of pathname ignoring the device slot."
(setq pathname (pathname pathname))
(let* ((directory (%pathname-directory pathname))
(name (%pathname-name pathname))
(type (%pathname-type pathname))
(result ""))
(declare (simple-string result))
(when directory
(setq result (concatenate 'simple-string result
(the simple-string (%dirstring directory)))))
(when name
(setq result (concatenate 'simple-string result
(the simple-string name))))
(when (and type (not (zerop (length type))))
(setq result (concatenate 'simple-string result "."
(the simple-string type))))
result))
;;; This function is somewhat bummed to make the Hemlock directory command
;;; is fast.
;;;
(defun file-namestring (pathname)
"Returns the name, type, and version of PATHNAME as a string."
(unless (pathnamep pathname) (setq pathname (pathname pathname)))
(let* ((name (%pathname-name pathname))
(type (%pathname-type pathname))
(result (or name "")))
(declare (simple-string result))
(if (and type (not (zerop (length type))))
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(concatenate 'simple-string result "." type)
result)))
(defun directory-namestring (pathname)
"Returns the device & directory parts of PATHNAME as a string."
(setq pathname (pathname pathname))
(let* ((directory (%pathname-directory pathname))
(result (%device-string (%pathname-device pathname))))
(declare (simple-string result))
(when directory
(setq result (concatenate 'simple-string result
(the simple-string (%dirstring directory)))))
result))
(defun host-namestring (pathname)
"Returns the host part of PATHNAME as a string."
(setq pathname (pathname pathname))
(%pathname-host pathname))
;;;; ENOUGH-NAMESTRING
(defun enough-namestring (pathname &optional
(defaults *default-pathname-defaults*))
"Returns a string which uniquely identifies PATHNAME w.r.t. DEFAULTS."
(setq pathname (pathname pathname))
(setq defaults (pathname defaults))
(let* ((device (%pathname-device pathname))
(directory (%pathname-directory pathname))
(name (%pathname-name pathname))
(type (%pathname-type pathname))
(result "")
(need-name nil))
(declare (simple-string result))
(when (and device (string-not-equal device (%pathname-device defaults)))
(setq result (%device-string device)))
(when (and directory
(not (equalp directory (%pathname-directory defaults))))
(setq result (concatenate 'simple-string result
(the simple-string (%dirstring directory)))))
(when (and name (string-not-equal name (%pathname-name defaults)))
(setq result (concatenate 'simple-string result
(the simple-string name))
need-name t))
(when (and type (or need-name
(string-not-equal type (%pathname-type defaults))))
(setq result (concatenate 'simple-string result "."
(the simple-string type))))
result))
;;;; TRUENAME and other stuff probing stuff.
;;; Truename -- Public
;;;
;;; Another silly file function trivially different from another function.
;;;
(defun truename (pathname)
"Return the pathname for the actual file described by the pathname
An error is signalled if no such file exists."
(let ((result (probe-file pathname)))
(unless result
(error "The file ~S does not exist." (namestring pathname)))
result))
;;; Do-Search-List -- Internal
;;;
;;; Bind var in turn to each element of search list with the specifed
;;; name.
;;;
(defmacro do-search-list ((var name &optional exit-form) . body)
"Do-Search-List (Var Name [Exit-Form]) {Form}*"
`(dolist (,var (resolve-search-list ,name nil) ,exit-form)
(declare (simple-string ,var))
,@body))
;;; Sub-Probe-File -- Internal
;;;
;;; Does the work of Probe-File, returning an additional value which
;;; indicates whether the name is really a file.
;;;
(defun sub-probe-file (pathname)
(setq pathname (pathname pathname))
(flet ((pathnamify (ns etype)
(declare (simple-string ns))
(case etype
(:entry_remote
(values (parse-namestring (concatenate 'simple-string ns "/"))
:entry_directory))
(t
(values (parse-namestring ns) etype)))))
(let ((log-name (or (%pathname-device pathname) "default")))
(if (eq log-name :absolute)
(let ((namestring (namestring pathname)))
(multiple-value-bind (name etype)
(mach:unix-subtestname namestring)
(if (null name) NIL
(pathnamify name etype))))
(if (null (%pathname-device pathname))
(multiple-value-bind (name etype)
(mach:unix-subtestname
(%ses-get-useful-name pathname))
(if (null name) NIL (pathnamify name etype)))
(let ((namestring (%ses-get-useful-name pathname)))
(do-search-list (entry log-name)
(let ((str (concatenate 'simple-string entry namestring)))
(declare (simple-string str))
(multiple-value-bind (name etype)
(mach:unix-subtestname str)
(when name
(return (pathnamify name etype))))))))))))
;;; Probe-File -- Public
;;;
;;; Just call Sub-Probe-File and return nil when it isn't a file.
;;;
(defun probe-file (pathname)
"Return a pathname which is the truename of the file if it exists, NIL
otherwise. Returns NIL for directories and other non-file entries."
(multiple-value-bind (pn f)
(sub-probe-file pathname)
(if (eq f :entry_file) pn)))
;;; Predict-Name -- Internal
;;;
;;; Predict-Name is a function used by Open to get an absolute pathname
;;; for a file being opened. Returns the truename of the file and
;;; whether it really exists or not.
;;;
(defun predict-name (file-name for-input)
(let* ((pathname (pathname file-name))
(device (%pathname-device pathname))
(truename (probe-file pathname)))
(cond ((eq device :absolute)
(if truename
(values (namestring truename) t)
;; Try again in case file-name is a directory.
(predict-name-with-subtest (namestring pathname))))
((and for-input truename)
(values (namestring truename) t))
(t
(let ((expansion (resolve-search-list (or device "default") t)))
(let ((name (concatenate 'simple-string (car expansion)
(%ses-get-useful-name pathname))))
(declare (simple-string name))
(predict-name-with-subtest name)))))))
(defun predict-name-with-subtest (name)
(let ((gr (mach:unix-subtestname name)))
(if gr
(values gr t)
(values (mach::simplify-file-name name) nil))))
;;; Rename-File -- Public
;;;
;;; If File is a File-Stream, then rename the associated file if it exists,
;;; otherwise just change the name in the stream. If not a file stream, then
;;; just rename the file.
;;;
(defun rename-file (file new-name)
"Rename File to have the specified New-Name. If file is a stream open to a
file, then the associated file is renamed. If the file does not yet exist
then the file is created with the New-Name when the stream is closed."
(if (streamp file)
(let* ((name (file-name file))
(pn (parse-namestring name))
(npn (merge-pathnames new-name pn))
(new (predict-name npn nil)))
(when (mach:quick-subtestname name)
(multiple-value-bind (res err) (mach:Unix-rename name new)
(if (null res) (error "Failed to rename ~A to ~A, unix error: ~A."
name new (mach:get-unix-error-msg err)))))
(file-name file new)
(values npn pn (parse-namestring new)))
(let* ((pn (or (sub-probe-file file)
(error "File to rename does not exist: ~S" file)))
(npn (merge-pathnames new-name pn))
(new (predict-name npn nil)))
(multiple-value-bind (res err) (mach:unix-rename (namestring pn) new)
(if res (values npn pn (parse-namestring new))
(error "Failed to rename ~A to ~A, unix error: ~A."
(namestring pn) new (mach:get-unix-error-msg err)))))))
;;; Delete-File -- Public
;;;
;;; Delete the file, Man.
;;;
(defun delete-file (file)
"Delete the specified file."
(let ((tn (sub-probe-file file)))
(when (streamp file)
(close file :abort t))
(if tn
(let ((ns (namestring tn)))
(multiple-value-bind (res err) (mach:unix-unlink ns)
(if (null res)
(error "Failed to delete ~A, unix error: ~A."
ns (mach:get-unix-error-msg err)))))
(unless (streamp file)
(error "File to be deleted does not exist: ~S" file))))
t)
;;; User-Homedir-Pathname -- Public
;;;
;;; If the user wants a meaningful homedir, she has to define Home:.
;;; Someday, login may do this for us. Since we must always return something,
;;; we just return Default: if it isn't defined.
;;;
(defun user-homedir-pathname (&optional host)
"Returns the home directory of the logged in user as a pathname.
This is obtained from the logical name \"home:\". If this is not defined,
then we return \"default:\""
(declare (ignore host))
(let ((home (cdr (assoc :home *environment-list* :test #'eq))))
(if home
(pathname (if (string-equal home "/") "/"
(concatenate 'simple-string home "/")))
(let ((expansion (if (search-list "home:")
(resolve-search-list "home" t))))
(if expansion
(car expansion)
(make-pathname :device "default"))))))
;;; File-Write-Date -- Public
;;;
(defun file-write-date (file)
"Return file's creation date, or NIL if it doesn't exist."
(let ((tn (sub-probe-file file)))
(when tn
(multiple-value-bind (res dev ino mode nlink uid gid
rdev size atime mtime)
(mach:unix-stat (namestring tn))
(declare (ignore dev ino mode nlink uid gid rdev size atime))
(if (null res) 0
(+ unix-to-universal-time mtime))))))
;;; File-Author -- Public
;;;
(defun file-author (file)
"Returns the file author as a string, or nil if the author cannot be
determined. Signals an error if file doesn't exist."
(let ((filename (truename file)))
(multiple-value-bind (winp dev ino mode nlink uid)
(mach:unix-stat (namestring filename))
(declare (ignore dev ino mode nlink))
(if winp (lookup-login-name uid)))))
;;;; DIRECTORY.
;;; DO-DIRECTORY searches a directory, binding the vars to the name and entry
;;; type. Pattern and All are used in MACH:UNIX-SEARCH-DIRECTORY.
;;;
(defmacro do-directory ((name-var etype-var pattern &optional (all t) result)
. body)
"Do-Directory (Name Entry-Type Pattern [All] [Result]) {Form}*.
If All is non-nil (the default), then Unix dot files to be processed.
Unix dot and dot-dot are never processed."
(let ((file (gensym))
(res (gensym))
(type (gensym))
(p (gensym)))
`(dolist (,file (mach:unix-search-directory ,pattern ,all)
,result)
(declare (simple-string ,file))
(let* ((,p (position #\/ ,file :from-end t))
(,name-var
(if ,p
(subseq ,file (the fixnum (1+ (the fixnum ,p))))
,file)))
(declare (simple-string ,name-var))
(unless (or (string= "." ,name-var) (string= ".." ,name-var))
(let ((,etype-var (multiple-value-bind (,res ,type)
(mach:quick-subtestname ,file)
(declare (ignore ,res))
,type)))
,@body))))))
(defun directory (pathname &key (all t))
"Returns a list of pathnames, one for each file that matches the given
pathname. Supplying :all as nil causes this to ignore Unix dot files. This
never includes Unix dot and dot-dot in the result."
(setq pathname (pathname pathname))
(multiple-value-bind (dir pattern) (find-directory pathname)
(let ((res ()))
(do-directory (name etype pattern all)
(if (eq etype :entry_file)
(let ((last-dot (position #\. name :from-end t)))
(push
(%make-pathname
"Mach" :absolute dir
(if last-dot (subseq name 0 last-dot) name)
(if last-dot (subseq name (1+ last-dot)))
nil)
res))
(push
(%make-pathname
"Mach" :absolute
(concatenate 'simple-vector dir (vector name))
nil nil nil)
res)))
(nreverse res))))
;;; FIND-DIRECTORY returns an absolute directory vector for pathname as a
;;; first argument and an absolute namestring. The namestring includes a
;;; trailing asterisk, wildcard, when the given pathname is immediately
;;; probe-able as a directory.
;;;
(defun find-directory (pathname)
(multiple-value-bind (pn type)
(sub-probe-file pathname)
(if pn
(let ((ns (namestring pn)))
(declare (simple-string ns))
(case type
(:entry_directory
(when (char/= (schar ns (the fixnum (1- (length ns)))) #\/)
(setq ns (concatenate 'simple-string ns "/")))
(values (%pathname-directory (pathname ns))
(concatenate 'simple-string ns "*")))
(t (values (%pathname-directory pn) ns))))
(multiple-value-bind (pn type)
(sub-probe-file
(make-pathname
:directory (%pathname-directory pathname)
:device (%pathname-device pathname)))
(unless pn
(error "Directory does not exist: ~S" pathname))
(let ((ns (namestring pn)))
(case type
(:entry_directory
(values
(%pathname-directory pn)
(concatenate 'simple-string ns (file-namestring pathname))))
(t
(error "~S is not a directory." pathname))))))))
;;;; Printing directories and determining file owner names.
;;; PRINT-DIRECTORY is exported from the EXTENSIONS package.
;;;
(defun print-directory (pathname &optional stream &key all verbose return-list)
"Like Directory, but prints a terse, multi-coloumn directory listing
instead of returning a list of pathnames. When :all is supplied and
non-nil, then Unix dot files are included too (as ls -a). When :vervose
is supplied and non-nil, then a long listing of miscellaneous
information is output one file per line."
(setf pathname (pathname pathname))
(let ((*standard-output* (out-synonym-of stream)))
(if verbose
(print-directory-verbose pathname all return-list)
(print-directory-formatted pathname all return-list))))
(defun print-directory-verbose (pathname all return-list)
(multiple-value-bind (dir pattern) (find-directory pathname)
(declare (ignore dir))
(format t "Directory of ~A :~%" pattern)
(let ((dir-name (directory-namestring pattern))
(result ()))
(do-directory (name etype pattern all (nreverse result))
(let ((slash-name (if (eq etype :entry_file)
name
(concatenate 'simple-string name "/"))))
(declare (simple-string slash-name))
(when return-list
(push (pathname (concatenate 'simple-string dir-name slash-name))
result))
(multiple-value-bind
(reslt dev-or-err ino mode nlink uid gid rdev size atime mtime)
(mach:unix-stat (concatenate 'simple-string dir-name name))
(declare (ignore ino gid rdev atime)
(fixnum uid mode))
(cond (reslt
;;
;; Print characters for file modes.
(macrolet ((frob (bit name &optional sbit sname negate)
`(if ,(if negate
`(not (logbitp ,bit mode))
`(logbitp ,bit mode))
,(if sbit
`(if (logbitp ,sbit mode)
(write-char ,sname)
(write-char ,name))
`(write-char ,name))
(write-char #\-))))
(frob 15 #\d nil nil t)
(frob 8 #\r)
(frob 7 #\w)
(frob 6 #\x 11 #\s)
(frob 5 #\r)
(frob 4 #\w)
(frob 3 #\x 10 #\s)
(frob 2 #\r)
(frob 1 #\w)
(frob 0 #\x))
;;
;; Print the rest.
(multiple-value-bind (sec min hour date month year)
(get-decoded-time)
(declare (ignore sec min hour date month))
(format t "~2D ~8A ~8D ~12A ~A~%"
nlink
(or (lookup-login-name uid) uid)
size
(decode-universal-time-for-files mtime year)
slash-name)))
(t (format t "Couldn't stat ~A -- ~A.~%"
slash-name
(mach:get-unix-error-msg dev-or-err))))))))))
(defun decode-universal-time-for-files (time current-year)
(multiple-value-bind (sec min hour day month year)
(decode-universal-time (+ time unix-to-universal-time))
(declare (ignore sec))
(format nil "~A ~2,' D ~:[ ~D~;~*~2,'0D:~2,'0D~]"
(svref '#("Jan" "Feb" "Mar" "Apr" "May" "Jun" "Jul" "Aug"
"Sep" "Oct" "Nov" "Dec")
(1- month))
day (= current-year year) year hour min)))
(defun print-directory-formatted (pathname all return-list)
(let ((width (or (line-length *standard-output*) 80))
(names ())
(cnt 0)
(max-len 0)
(result ()))
(declare (list names) (fixnum max-len cnt))
;;
;; Get the data.
(multiple-value-bind (dir pattern) (find-directory pathname)
(declare (ignore dir))
(do-directory (name etype pattern all)
(let* ((slash-name (if (eql etype :entry_file)
name
(concatenate 'simple-string name "/")))
(len (length slash-name)))
(declare (simple-string slash-name)
(fixnum len))
(when return-list
(push (pathname (concatenate 'simple-string
(directory-namestring pattern)
slash-name))
result))
(if (> len max-len) (setq max-len len))
(incf cnt)
(push slash-name names)))
(setq names (nreverse names))
;;
;; Do the output.
(let* ((col-width (1+ max-len))
(cols (max (truncate width col-width) 1))
(lines (ceiling cnt cols)))
(declare (fixnum cols lines))
(format t "Directory of ~A :~%" pattern)
(dotimes (i lines)
(declare (fixnum i))
(dotimes (j cols)
(declare (fixnum j))
(let ((name (nth (+ i (the fixnum (* j lines))) names)))
(when name
(write-string name)
(unless (eql j (1- cols))
(tab-over
(- col-width (length (the simple-string name))))))))
(terpri))))
(when return-list (nreverse result))))
;;;; Translating uid's and gid's.
(defvar *uid-hash-table* (make-hash-table)
"Hash table for keeping track of uid's and login names.")
;;; LOOKUP-LOGIN-NAME translates a user id into a login name. Previous
;;; lookups are cached in a hash table since groveling the passwd(s) files
;;; is somewhat expensive. The table may hold nil for id's that cannot
;;; be looked up since this means the files are searched in their entirety
;;; each time this id is translated.
;;;
(defun lookup-login-name (uid)
(multiple-value-bind (login-name foundp) (gethash uid *uid-hash-table*)
(if foundp
login-name
(setf (gethash uid *uid-hash-table*)
(get-group-or-user-name :user uid)))))
(defvar *gid-hash-table* (make-hash-table)
"Hash table for keeping track of gid's and group names.")
;;; LOOKUP-GROUP-NAME translates a group id into a group name. Previous
;;; lookups are cached in a hash table since groveling the group(s) files
;;; is somewhat expensive. The table may hold nil for id's that cannot
;;; be looked up since this means the files are searched in their entirety
;;; each time this id is translated.
;;;
(defun lookup-group-name (gid)
(multiple-value-bind (group-name foundp) (gethash gid *gid-hash-table*)
(if foundp
group-name
(setf (gethash gid *gid-hash-table*)
(get-group-or-user-name :group gid)))))
;;; GET-GROUP-OR-USER-NAME first tries "/etc/passwd" ("/etc/group") since it is
;;; a much smaller file, contains all the local id's, and most uses probably
;;; involve id's on machines one would login into. Then if necessary, we look
;;; in "/etc/passwds" ("/etc/groups") which is really long and has to be
;;; fetched over the net.
;;;
(defun get-group-or-user-name (group-or-user id)
"Returns the simple-string user or group name of the user whose uid or gid
is id, or NIL if no such user or group exists. Group-or-user is either
:group or :user."
(let ((id-string (let ((*print-base* 10)) (prin1-to-string id))))
(declare (simple-string id-string))
(multiple-value-bind (file1 file2)
(ecase group-or-user
(:group (values "/etc/group" "/etc/groups"))
(:user (values "/etc/passwd" "/etc/passwd")))
(or (get-group-or-user-name-aux id-string file1)
(get-group-or-user-name-aux id-string file2)))))
(defun get-group-or-user-name-aux (id-string passwd-file)
(with-open-file (stream passwd-file)
(loop
(let ((entry (read-line stream nil)))
(unless entry (return nil))
(let ((name-end (position #\: (the simple-string entry)
:test #'char=)))
(when name-end
(let ((id-start (position #\: (the simple-string entry)
:start (1+ name-end) :test #'char=)))
(when id-start
(incf id-start)
(let ((id-end (position #\: (the simple-string entry)
:start id-start :test #'char=)))
(when (and id-end
(string= id-string entry
:start2 id-start :end2 id-end))
(return (subseq entry 0 name-end))))))))))))
;;; Complete-One-File -- Internal
;;;
;;; Return as values a string and the greatest common prefix of all
;;; the files corresponding to pattern.
;;;
(defun complete-one-file (pattern default-type ignore-types)
(let ((first nil)
(length nil))
(do-directory (name etype pattern nil)
(declare (ignore etype))
(let* ((last-dot (position #\. name :from-end t))
(type (if last-dot (subseq name (1+ last-dot)))))
(cond ((and (not (string= type default-type))
(member type ignore-types :test #'string=)))
(first
(let ((msm (string-not-equal name first :end2 length)))
(when (and msm (< msm length))
(setq length msm))))
(t
(setq first name)
(setq length (length name))))))
(values first length)))
;;; Complete-File -- Public
;;;
;;; If the pathname is absolute, just call Complete-One-File on and test
;;; whether the result is a file. If a relative pathname, do it on each
;;; directory, accumulating the result.
;;;
(defun complete-file (pathname &key defaults ignore-types)
"Attempt to complete Pathname as the name of a file. If the resulting
completion is unique, return T as the second value. If there is no
possible completion, return both values NIL."
(setq pathname (pathname pathname))
(setq defaults (if defaults (pathname defaults) *default-pathname-defaults*))
(flet ((pathnamify (res len ambiguous pathname)
(values
(make-pathname :device (%pathname-device pathname)
:directory (%pathname-directory pathname)
:defaults (parse-namestring (subseq res 0 len)))
(not ambiguous))))
(let ((dev (or (%pathname-device pathname) "default"))
(default-type (%pathname-type defaults)))
(if (eq dev :absolute)
(multiple-value-bind
(res len)
(complete-one-file (concatenate 'simple-string
(namestring pathname)
"*")
default-type ignore-types)
(declare (fixnum len))
(if res
(pathnamify res len
(/= (the fixnum (length res)) len)
pathname)
(values nil nil)))
(let ((namestring (%ses-get-useful-name pathname))
(dirs (if (and (%pathname-directory defaults)
(string-equal dev "default"))
(list (directory-namestring defaults))
()))
(max most-positive-fixnum)